3d print the two STL files attached to this project. I printed the plane and wedge on their sides and both came out nicely. Of course I use a nice printer with soluble support material, your results may vary. I may revise the design in the future to make it easier to print without support material.
Cut a section in the wedge using a file or exacto knife to allow shavings to flow out past the blade edge. If you don't do this the tool won't work, so do it! I will eventually update the 3d model to reflect this mod.